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Introductory Physics Homework Help
Nebulosity of an O Star (Homework Question)
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[QUOTE="Ken G, post: 5700271, member: 116697"] Ask yourself if there can be much gas in the vicinity of the O star. If there were, what would the O starlight do to that gas, and what would that look like in the spectrum? So it sounds like your analysis is on the right track-- there can't be any clouds very close to the star. But if you see nebulosity, it must be from a more distant background cloud that contains dust, so I think you are right that reflection nebula is what you want to think about. By the way, I'm wondering if the questioner has overlooked the fact that O stars have strong winds, so the star makes its own nebulosity. Perhaps they mean you are looking in a region of the spectrum that does not contain wind lines, but could contain interstellar lines if there was an HII region there. I think they might have just forgotten about the stellar wind. [/QUOTE]
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Nebulosity of an O Star (Homework Question)
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